Improvement in modes of securing crosscut-saws to their handles



UNITED STATES PATENT QFFIGE.

EMANUEL ANDREVS, 0F VILLIAMSIORT, PENNSYLVANIA.

IMPROVEMENT IN MODES 0F SECURING CRO'SSCUT-SAWS TO THEIR HANDLES.

Specilication forming part of Letters Patent No. 58,569, dated October 9, ISGS,

To all whom it may concern:

Beit known that I, EMANUEL ANDREWS, of IVilliainsport, in the countyofLycoining,in the State of Pennsylvania, have invented certain new and useful Improvements in Handles and Mountings for Crosscut-Saws; and I do hereby declare that the following is a full and exact description thereof.

It is frequentlynecessary to detach handles from saws, to allow the withdrawal of the saw endwise from a log, in consequence of the settling or bending downward ot' the log at that point. Means have been provided for eiiecting this with great facility; but they are ob-- jectionable on account of the liability of the handle to become loosened in the course ofthe ordinary work. My invention is intended to obviate this difficulty.

The common plan is to receive the end of the saw in a longitudinal slot in a screw-bolt, and to screw down the handle upon the screwbolt, so as to press with the end of thehandle or with a metal ferrule upon the upper edge of the saw. When the handle is to be removed, the handle is sim ply turned aroundafew times, so as to raise it on the slotted bolt, and thus liberate the saw.

My invention consists in providing a con veulent movable stop or dog, which shall lock the handle after it has been lscrewed down firmly, and thus retain it beyond a possibility of becoming loose. Vhen it is desired to remove the handle, the lirst step is to remove the stop, then the handle may be readily unscrewed.

It also consists in a novel form of that part of the bolt which seizes the saw, the same being open on one side, or hook-formed, to allow ot' more convenient operation in cases where the end of the saw has become battered or otherwise distorted.

I will first describe what I consider the best mode of carrying out the invention, and will afterward point out the features which I claim as new.

The accompanying drawings form a part ot' this specification.

'Iints are employed to distinguish parts, and do not indicate difference of materials. The material of all the tinted parts may be iron.

Figure l is a side elevation, partly in section, showil'ig an end ofthe saw with the handle in position. Fig. 2 is an end view of the saw and hookbolt. Fig. 3 is a horizontal section on the line S S in Figs. l and 2.

Similar letters ot' reference indicate like parts in all the figures.

A is the blade ofthe saw. B is a handle of wood. B1 is a nut of metal firmly fixed therein, and B2 is a metallic ferr-ale, firmly fitted on the lower end, and prevented from turning thereon by the internal projections b2, as seen in Fig. 3. The exterior of this ferrule B2 is provided with notches, as indicated by B3.

C is a hook-bolt, adapted to seize the lower edge of the end of the saw, and to draw the handle down thereon by the action of its screwthreads in the nut Bl, as will be obvious.

D is a casting surrounding the bolt C below the ferrule Bl. rIhis castin g may be notched to afford a better bearing to rest on the upper edge of the saw 5 and its upper face, as also the lower face ofthe ferrule BZ, may be finished in a lathe, or otherwise, to allow them to turn upon each other more smoothly.

D is an arm extending up from one side of the casting D. E is a pointed thumb-screw, tapped through the arm D', and adapted to iit into either of the notches, B3-

Ihe casting D serves to tak@ 110m 0f the upper edge ofthe saw. The hoOk-bOlt C takes hold of the lower edge of the S2W', and the saw is tightlyheld between theSG DSHS When ever the handle B is screwed dOWIl mld the thumb-screw screwed in so as t0 100k ill 0116 of the notches B3. In this condilOIl 0f the parts the handle may be exposed t0 all J0116 strains, including the torsional SJFHJIQS fr@ qently given by the hands in opffltmg 1t, without any liability of loosening lt- T0 I inove the handle it is necessary, fllSl, t0 1111- screw the thumb-screw E to a sufllll 6X- tent to withdraw its point from the DOCll B3, in which it previously stood. Then, 011 applying the hands strongly to the handle B, and twisting it around afew times, the hook-bolt C is lowered, and the sawis no longer pressed between the hook and the piece D. The handle may now be slipped oit' from the end of the saw and the saw withdrawn.

The frequently-occurring cases in lumberin g where the saw-hert1 closes above the saw, in

consequence of the settling or bending downward of the log at the point being sawed, involves a necessity for frequently removing the saw by withdrawing it endwise through the log, or risking its destruction by the rolling of the log in an attempt to elevate it; and it is found unavoidable, in the severe labor of sawing, to give twisting-strains to the handle sufcient to loosen the handle of the saw, as ordinarily applied 5 and the tendency to loosen the handle annoys and increases the labor of the workmen.y My invention, as above described, completely overcomes the difficulty by the use of the arm D and screw E, arranged to lock the handle, as represented.

I do not conne myself to the use of a. screw as locking means. It is easy to arrange a turning cam or sliding bolt or spring-dog, or various other devices, actuated by spring or otherwise, as substitutes therefor.

The screw-bolt G may, if preferred, be simply slotted like the screw-bolts ordinarily employed in holding` saws; but I prefer to give it the hook form represented. I make the part which takes hold of tbe saw in the same form as one side and end of the ordinary slotted bolt, but little stouter, so that my boltpossesses all the strength and rigidity of the solid bolt, and is easier to construct and is more reliable; In the manufacture of a slotted bolt there are liable to be imperfections in the weldin g which injure the strength of the bolt at the top in -where it enters the handle, where the trans- Vverse strain is the greatest.

the best mode of applying my improvement,

what I claim as my invention, and desire to secure by Letters Patent, is as follows:

1. The removable stop E and series of holding-places B3, arranged for joint operation in fastening and liberating a saw-plate, A, substantially as and for the purposeherein specified:

2. A saw-handle, B, so arranged as to allow the removal and introduction of the sawblade A by a turning and lateral movement, without the necessity for passing the end of the blade through the bolt, all substantially as and for the purpose herein specified.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

EMANUEL ANDREWVS.

Witnesses EMIL VossNAoK, D. L. FREEBORN. 

